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United States Patent | 5,183,130 |
Nakamura ,   et al. | February 2, 1993 |
A motorcycle covered by a cowl includes a power unit comprising an engine and a power transmission device enclosed by a cover within which an engine fan induces cooling air into heat transfer relation with said engine. A muffler device enclosed by the cowl has an air guide cover within which cooling air inducted into the power unit cover is passed thereinto in order to cool the muffler. According to an aspect of the invention the vehicle body frame has a hollow main frame operative to induce a flow of cooling air and for discharging it into cooling relation with the power transmission device.
Inventors: | Nakamura; Michio (Saitama, JP); Okunosono; Toshihiko (Saitama, JP); Kajikawa; Tsuneo (Saitama, JP) |
Assignee: | Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) |
Appl. No.: | 557078 |
Filed: | July 25, 1990 |
Jul 25, 1989[JP] | 1-192263 |
Current U.S. Class: | 180/219; 60/320; 180/68.1; 180/68.2; 180/68.3; 180/89.2; 180/229; 180/309; 181/239 |
Intern'l Class: | B60K 011/06; B62D 061/02; F01N 007/14 |
Field of Search: | 180/219,225,229,231,68.1,68.2,68.3,309,89.2 60/320,321 123/44.11,41.01 181/239 |
4632210 | Dec., 1986 | Yamamoto et al. | 180/89. |
4633965 | Jan., 1987 | Tsurumi et al. | 180/68. |
4671781 | Jun., 1987 | Tanaka et al. | 180/229. |
4699232 | Oct., 1987 | Nebu et al. | 180/309. |
4712629 | Dec., 1987 | Takahashi et al. | 180/68. |
4723617 | Feb., 1988 | Kitada | 180/229. |
4733639 | Mar., 1988 | Kohyama et al. | 180/229. |
4770262 | Sep., 1988 | Yasunaga et al. | 180/229. |
4809800 | Mar., 1989 | Suzuki | 180/309. |
4881614 | Nov., 1989 | Hoshi et al. | 180/309. |
4903485 | Feb., 1990 | Tamba et al. | 60/320. |
5012883 | May., 1991 | Hiramatsu | 180/219. |
Foreign Patent Documents | |||
177718 | Oct., 1983 | JP | 180/309. |
15624 | Jan., 1984 | JP | 180/89. |
211134 | Sep., 1986 | JP | 180/229. |